Each node indicates the common ancestors of descendants
Unique history (divergence or speciation) represents key molecular change
Often represented as morphological (structural) trait in a fossil-based phylogeny
White Sands formed recently (2,000 years old), and the substrate color of the white gypsum habitat contrasts dramatically with the surrounding Chihuahuan Desert’s dark soils habitat
A very dramatic selection environment leading to concealing coloration for predation avoidance
More gametes (sperm and egg) are produced than seed the next generation
Random sampling gametes can change the genetic composition of a population over time
Bring a shareable version of your topic selection to class
In small groups, you will present your topic and collect feedback
Groups will also review your writing (length should be ~1/2 page)
If you can’t convince your peers, you wont convince me!
Use your peers wonderful advice to clean up your submission (due Sunday)